Ultrafast Saturable Absorption of Core/Shell Colloidal Quantum Dots

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 中科院强激光材料重点实验室

	Ultrafast Saturable Absorption of Core/Shell Colloidal Quantum Dots
	Li, Jingzhou; Zhang, Saifeng; Dong, Hongxing; Ma, Yunfei; Xu, Bin; Wang, Jun; Cai, Zhiping; Chen, Zhanghai; Zhang, Long
刊名	Part. Part. Syst. Charact.
	2017
卷号	34 期号:1
通讯作者	hongxingd@siom.ac.cn ; lzhang@siom.ac.cn
英文摘要	Ultrafast saturable absorption (SA) materials that are capable of blocking the optical absorption under strong excitation have extensive applications in photonic devices. This work presents core/shell colloidal quantum dots (CQDs) which have the quantized energy levels, excellent band gap tunability, and possess significant SA performance. When the band gap is close to the pump pulse energy, the CQDs show significant resonant SA response. At the same excitation conditions, the core/shell CQDs dispersions show better SA response than graphene dispersions, and comparable to the recently reported molybdenum disulfide. The carrier dynamics of the SA of the CQDs is analyzed systematically. The research has also found that the two-photon absorption of the CQDs show nearly cubic power law of the band gap, while the SA performance keeps almost the same in the nonresonant regime. Further, superior passive Q-switched laser behavior is observed using the CQDs as a saturable absorber. The results directly reveal the physical processes of this basic problem and broaden the applications of CQDs in photonic devices.
收录类别	SCI
资助信息	NSFC [61378074, 61475173, 61308034, 61575164]; Shanghai Rising-Star Program [14QA1404000]; Youth Innovation Promotion Association of Chinese Academy of Sciences
WOS记录号	WOS:000393580600005
内容类型	期刊论文
源URL	[http://ir.siom.ac.cn/handle/181231/28214]
专题	上海光学精密机械研究所_中科院强激光材料重点实验室
作者单位	中国科学院上海光学精密机械研究所
推荐引用方式 GB/T 7714	Li, Jingzhou,Zhang, Saifeng,Dong, Hongxing,et al. Ultrafast Saturable Absorption of Core/Shell Colloidal Quantum Dots[J]. Part. Part. Syst. Charact.,2017,34(1).
APA	Li, Jingzhou.,Zhang, Saifeng.,Dong, Hongxing.,Ma, Yunfei.,Xu, Bin.,...&Zhang, Long.(2017).Ultrafast Saturable Absorption of Core/Shell Colloidal Quantum Dots.Part. Part. Syst. Charact.,34(1).
MLA	Li, Jingzhou,et al."Ultrafast Saturable Absorption of Core/Shell Colloidal Quantum Dots".Part. Part. Syst. Charact. 34.1(2017).